11.8

实验11：装饰模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容： 

1、理解装饰模式的动机，掌握该模式的结构；

2、能够利用装饰模式解决实际问题。

 

[实验任务一]：手机功能的升级

用装饰模式模拟手机功能的升级过程：简单的手机(SimplePhone)在接收来电时，会发出声音提醒主人；而JarPhone除了声音还能振动；更高级的手机(ComplexPhone)除了声音、振动外，还有灯光闪烁提示。

实验要求：

 

类图、

代码

1、Phone.java

package org.example.shiyanshiyi;

public interface Phone {
    void ring();
}

 

2、SimplePhone.java

package org.example.shiyanshiyi;

public class SimplePhone implements Phone{
    @Override
    public void ring(){
        System.out.println("手机响铃");
    }
}

 

3、PhoneDector.java

package org.example.shiyanshiyi;

public abstract class PhoneDecorator implements Phone{
    protected Phone phone;
    public PhoneDecorator(Phone phone){
        this.phone=phone;
    }
    @Override
    public void ring(){
        phone.ring();
    }
}

 

4、JarPhone.java

package org.example.shiyanshiyi;

public class JarPhone extends PhoneDecorator{
    public JarPhone(Phone phone){
        super(phone);
    }
    @Override
    public void ring(){
        super.ring();
        vibrate();
    }
    private void vibrate(){
        System.out.println("手机振动");
    }
}

 

5、ComplexPhone.java

package org.example.shiyanshiyi;

public class ComplexPhone extends PhoneDecorator{
    public ComplexPhone(Phone phone){
        super(phone);
    }
    @Override
    public void ring(){
        super.ring();
        flashLight();
    }

    private void flashLight() {
        System.out.println("手机灯光闪烁");
    }
}

 

6、Client.java

package org.example.shiyanshiyi;

public class Client {
    public static void main(String[] args) {
        Phone simplePhone=new SimplePhone();
        simplePhone.ring();
        Phone jarPhone=new JarPhone(simplePhone);
        jarPhone.ring();
        Phone complexPhone=new ComplexPhone(jarPhone);
        complexPhone.ring();
    }
}

 

运行结果